is brain inflammation, usually caused by infection or immune system problems.

is a rare brain inflammation linked to extreme sleepiness and movement problems.

is a rare infection caused by tiny parasite-like fungi called microsporidia.

is brain damage from injury or infection before or shortly after birth.

is a rare congenital condition affecting the skin, eyes, and brain.

is softening of brain tissue caused by injury, stroke, infection, or bleeding.

is inflammation of the brain and spinal cord, often from infection.

is a rare genetic disorder affecting brain development and energy-making cell parts.

is a rare genetic disorder affecting brain development and cell energy function.

is a rare inherited disorder that affects the brain and nervous system.

is a rare inherited disorder that damages the brain and nervous system.

is a rare genetic condition affecting the brain, heart, and kidney tubules.

is a rare birth defect where the aorta forms a ring.

is the final stage of chronic kidney disease requiring dialysis or transplant.

is an enlarged thyroid gland, often caused by too little iodine.

is a rare autoimmune skin disease causing fragile blisters and crusting.

is a flea-borne bacterial infection that usually causes fever, headache, and rash.

is a rare, noncancerous airway tumor made of smooth muscle.

is a rare noncancerous airway tumor made of fatty tissue.

is a rare heart condition causing thickened lining and weakened pumping.

is a serious infection of the heart’s inner lining or valves.

is a very rare cancer affecting the heart’s inner lining.

is a condition affecting the heart’s inner lining, sometimes disrupting valve function.

is a rare cervical cancer that starts in mucus-producing gland cells.